Yokobori S, Oshima T, Wada H.
Mol Phylogenet Evol. 2005 Feb;34(2):273-83. Epub 2004 Nov 19 doi:10.1016/j.ympev.2004.10.002
Complete nucleotide sequence of the mitochondrial genome of Doliolum nationalis with implications for evolution of urochordates.